I'm trying to use kontakt4 with Sibelius 6.2 and i can't find the kontakt4.dll file so i can copy it to C:\Program Files\Sibelius Software\VSTPlugins. Please let me know where to find this file because i searched it and it still didn't come up.

If you elected to install the VST version of Kontakt 4 when you initially installed it, you'll probably find this file somewhere in your Native Instruments folders. Try: C:\Program Files\Native Instruments\Kontakt 4\VSTPlugins

If you can't find it, I would suggest reinstalling Kontakt 4, verifying that the VST Plugin version is in fact being installed.

I found it where you told me.  Thank you so much :-)